Folsom doksett



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FOLSOMDORSE'IT-y CHICAG-Q, ILLINOIS.

Leners Parmrlva 68,2911, dared August 27, 1867. y

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TO ALL .WHOM IT'MAY CONCERN:

-Bve it known that I, FOLSOM DORSETT, of Chicago, in the county of Cook, and State of Illinois, have invented a new and useful Improvement lin the Mode of Preserving Grain or Hay in the stack or mow, or corn in the crib, bin, or rick; and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings, making part of this specication, in which- Fig're l is a vside-elevation of a. stack of grain. i

Figure v2 'is an end elevationof the same.

Figure 3 is a side elevation of. one of the ventilators; and

Figure 4 is a plan of. the same. i i

The same, letters are employed in all the gures'inthe indication of identical parts. j

Myinvention consists in the introduction vof asysteni of Ventilating-frames into the body-of the'st'ack or heap, and in the mode of constructing the roof for covering` the same, said ventilators being so constructed that by means of doors or slides the admission of air may be regulated according to circumstances.

In preparing for the stack, I build afoundation of timbers so that the hay or grain maybe` elevated above-the ground, sous not to absorb tbe-moisture from the same. lI also construct the roof'- C iii-sections, which may be readily removed from place to place and attached toone another as required to form a roof` for a stack of any size. These 'sections when placed 4fora rooi` are lapped so as to exclude the ruin, and fastened by hooks and staples. Having provided in the construction ofthe lbottom timbers for a free circulation of air below the stack, I lay thehay, grain, or other materialupon the flooring to the depth of say fromA two to ve feet, according to its condition. I then-place unen the material asystem of Ventilating-frames, B B, composed of latticework, so as to procure a thorough vehtilation toall parts of the stack. I then lay on'mo're of the-hay or grain and introduce other series of ventilatingframes in' like manneiyaccording to the size and' height of the stack and condition ofthe hay or grain until 4the stack iscompleted. The sides may be enclosed with a frame of timbers, if preferred. When the stack is thus completedl putonl the sectional roof as described. The Ventilating.- frames are timber frames of convenient shapeand suitable length, formed by longitufdinahpieces at the angles,

united by cross-pieces, forming an open-latticed work through, which the air may at all parts circulate freely.-

These frames `when in use project beyond thesurface of the stack, to givcfree play to the sliding doorsD. They may be arranged all horizontally, cross-sections uniting, if desired, theframes passing through the stack, or the sections may be `placed vertically leading from the frame which lies` horizontal througbth-e stack. The ends of 'the Ventilating-tubes are closed luy-sliding o r other doors, B, by means of which the admission and circulation of air may be regulated according to circumstances. Thus, in very wet weather, I would "close all the 4doors` in drywea'ther' those at one or both ends may be opened; in moderately wet weather I would close the doors on the Windward side, leaving them open on theother side.

What I'clnim as my invention, and desire .to secure by Letters Patent, is V1. A system of Ventilating-frames, A A', used in stacks oi' hay, grain, &c.,'said frames being adjustably closed by doors B, and arranged to operate substantially as set forth..

' 2. The combination of such a system of adjustable Ventilating-frames and l an adjustable sectional roof vin stacks, tc., ofhay, grain, site., substantially -as set forth. i

I FOLSOM DORSETT.'

Witnesses:

CfM. HWLEY, J. H. TRUMBULL. 

